Question

A rectangular room is 6 m long, 5 m wide and 3.5 m high. It has 2 doors of size
1.1 m by 2 m and 3 windows of size 1.5 m by 1.4 m. Find the cost of white washing
the walls and the ceiling of the room at the rate of 5.30 per square metre.
11 A
bo​

Answer 1

Answer:

Rs.510.39

Step-by-step explanation:

Given,

Length of room =6m

Breadth of room =5m

Height of room =3.5m

So, Area of four walls =2(+b)×h=2(6+5)×3.5=77m

2

Area of 2 doors and 3 windows =(2×1.1×2+3×1.5×1.4)=(44+6.3)m

2

=10.7m

2

Area of ceiling =l×b=6×5=30m

2

Thus, total area for whitewashing =(77−10.7+30)m

2

=96.3m

2

Hence, the cost of whitewashing =Rs.(96.3×5.30)=Rs.510.39

Hope it helps you.

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